{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2025-0069",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "ultravox-v0_5-llama-3_2-1b: structural change at 0ace0e2 (2025-02-07)",
 "details": "ultravox-v0_5-llama-3_2-1b: layer count unset to 16; derived parameters 2.42B to 2.84B (+419.5M, +0.84 GB of bf16 weights) (2025-02-07).\n\nRepository: https://huggingface.co/fixie-ai/ultravox-v0_5-llama-3_2-1b. Revisions from 0ace0e297729be51dda27bfb2fd26442d35e807c onward carry this change; a pin at f27f705716a3aebde26fed3e3f1966e99f4a59c6 or earlier does not.\n\nChanged keys:\n- num_hidden_layers: unset -> 16 (structural)\n\nThis record says what the change does mechanically. It is not a report that anything broke for anyone.",
 "affected": [
  {
   "ranges": [
    {
     "type": "GIT",
     "repo": "https://huggingface.co/fixie-ai/ultravox-v0_5-llama-3_2-1b",
     "events": [
      {
       "introduced": "0ace0e297729be51dda27bfb2fd26442d35e807c"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "fixie-ai/ultravox-v0_5-llama-3_2-1b",
    "previous_revision": "f27f705716a3aebde26fed3e3f1966e99f4a59c6"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/fixie-ai/ultravox-v0_5-llama-3_2-1b/commit/0ace0e297729be51dda27bfb2fd26442d35e807c"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/fixie-ai/ultravox-v0_5-llama-3_2-1b"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/fixie-ai/ultravox-v0_5-llama-3_2-1b.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "fixie-ai/ultravox-v0_5-llama-3_2-1b",
  "kind": "structural",
  "classes": [
   "structural"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "num_hidden_layers",
    "before": null,
    "after": 16,
    "class": "structural"
   }
  ],
  "impact": {
   "memory": true,
   "serving": false,
   "tokenizer": false,
   "licence": null
  },
  "breaking": true,
  "breaking_rule": "https://www.neurarch.com/changes-feeds/advisories/index.json#breaking_rule",
  "consequence": {
   "params": {
    "before": 2418734336,
    "after": 2838197504
   },
   "weightsGbBf16": {
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    "after": 5.676
   },
   "trainPeakGb": {
    "before": 79.553,
    "after": 96.445
   },
   "fingerprint": {
    "before": "1c881eaf",
    "after": "eefd22cc"
   },
   "context": null,
   "eos": null,
   "bos": null
  },
  "commit_date": "2025-02-07T00:24:03.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 0,
  "license": "CC-BY-4.0"
 }
}